The scroll function on a laptop computer allows you to use the touch pad for vertical scrolling in the same way a mouse wheel works with the cursor on the screen. The touch pad on a laptop can scroll horizontally as well. Turning on this function in Windows XP is similar to activating it for most Windows-based systems used on laptops, but adjustments will vary depending on the specific operating system.
Click the "Start" button in the left bottom corner. Click "Control Panel."
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Click "Printers and other hardware" from the listed categories on the control panel page.
Click the "Mouse" icon from the list of selections on the printers and other hardware page.
Click the "Advanced" tab on the mouse properties box. Click "Advanced feature settings."
Click the "Touch Pad" tab on the advanced feature settings box. Click a check mark into the box next to "Use Scroll function" under Touch Pad settings. Click "Apply" at the lower right of the box, then click "OK."